<!DOCTYPE html>
<html>
<head>
    <title>H5 Page</title>
</head>
<body>
<!--<body style="background-color: yellow;">-->
<button style="font-size: 32px;" onclick="navigateToFlutter()">点击我跳转到flutter页面</button>
<script type="text/javascript">
        function navigateToFlutter() {
            // 调用Flutter方法
            flutter_method_channel.postMessage("123456");;
        }
    </script>
<p style="font-size: 66px;">这是一个web页面</p>
</body>
</html>